actually.... I have pretty much nothing to contribute to this discussion.. Allthough I have always wondered what the hell a non important server has to do with raid?

I thought that all what raid was doing, was to mirror disks. So that when 1 disk fails, disk2 takes over the job. (if for ex. your root is on disk1 and that fails the server can still operate because the root is also on disk2?)
So why would anybody want to use raid @home and use 2 disks for the same job?

Or is there any performance improvements by this? By enebaling multi read/write (?) so that the OS can read from 2 different parts off the root at the same time?
would love some pretty good explenations on this!
Got link?...=)